HBS 2.2 Quiz

A nerve cell; a fundamental unit of the nervous system is called a

• axon

• dendrite

• neurotransmitter

• neuron

The ________ is an insulating coat of cell membrane from Schwann cells that is interrupted by the nodes of Ranvier.

• axon

• dendrite

• myelin sheath

• cell body

A substance that carries nerve impulses across a synapse is _______.

• Calcium

• Neurotransmitter

• sodium

• potassium

Which ions are involved in creating the gradient which propels action potential?

• sodium and potassium ions

• sodium and calcium ions

• potassium and calcium ions

• calcium and potassium ions

A brain disorder in which a person loses neurons that release acetylcholine and therefore contributes to a build-up of plaques in the brain is called

• Epilepsy

• Parkinson's Disease

• Alzheimer's Disease

• ALS - Lou Gehrig's Disease

A neurological disorder which destroys the motor neurons of a person who will progressively lose the ability to care for himself or herself.

• ALS - Lou Gehrig's Disease

• Epilepsy

• Alzheimer's Disease

• Multiple Sclerosis

Which specific membrane protein is responsible for restoring the original concentration of ions during the action potential?

• Na channel

• K Channel

• both the Na and K channels

• Na/K Pump

Which process moves ions from lower concentration to higher concentration going against the concentration gradient during an action potential?  This process requires ATP.

• facilitated diffusion

• active transport

• passive transport

• Diffusion

Which statement is in the correct order of events which occur during a reflex arc beginning with a stimulus?

• stimulus causes action potential in the sensory receptor, message travels along the interneurons neuron, message reaches the sensory, message travels along the motor neurons, message causes muscle to contract

• stimulus causes action potential in the sensory receptor, message travels along the sensory neuron, message reaches the interneurons, message travels along the motor neurons, message causes muscle to contract

• stimulus causes action potential in the sensory receptor, message travels along the motor neuron, message reaches the interneurons, message travels along the sensory neurons, message causes muscle to contract

• stimulus causes action potential in the sensory receptor, message travels along the sensory neuron, message reaches the motor neurons, message travels along the interneurons, message causes muscle to contract

Indicate which structure is represented by the letter A in the picture below.

• Myelin Sheath

• Axon

• Axon Terminal

• Dendrite

Tags

NGSS.MS-LS1-2